How do I know what version of Outlook I have installed? Carolyn Chassaigne May 01, 2020 12:18 Updated In Outlook, go to File > Office account and look under Product Information. If you want more information on your Outlook version, head here. Related articles How do I install Yesware for O365? What versions of Outlook does Yesware support? What should I do if my Yesware add-in disappears from my Outlook inbox? How do I reinstall Yesware for Outlook? Why isn't the Yesware Sidebar showing in Outlook?